139143280 has 20 divisors (see below), whose sum is σ = 323508312. Its totient is φ = 55657280.

The previous prime is 139143269. The next prime is 139143287. The reversal of 139143280 is 82341931.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139143287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869566 + ... + 869725.

Almost surely, 2^139143280 is an apocalyptic number.

139143280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139143280 is an abundant number, since it is smaller than the sum of its proper divisors (184365032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139143280 is a wasteful number, since it uses less digits than its factorization.

139143280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739304 (or 1739298 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 139143280 is about 11795.9009829686. The cubic root of 139143280 is about 518.1880724130.

The spelling of 139143280 in words is "one hundred thirty-nine million, one hundred forty-three thousand, two hundred eighty".